Curt Engelhorn Zentrum Archäometrie

We report 27 planktonic and 21 benthic radiocarbon ages from the subtropical marine sediment core ODP Site 1063 (Bermuda Rise) for the time range between 30 and 14 ka before present. Despite low abundances of benthic specimens, it was possible to measure radiocarbon ages down to ∼10 µg carbon using a MICADAS and the gas ion source developed at ETH Zurich. Based on a tentative radiocarbon–independent age-model we found that the radiocarbon reservoir of the bottom water varied moderately relative to the analytical and age-model related uncertainties throughout the examined time-period, but larger differences in the radiocarbon reservoir appear to have affected the upper ocean layer. In particular, radiocarbon levels around Heinrich Stadial 2 reveal surface radiocarbon content similar to that of the atmosphere, while during Heinrich Stadial 1 surface waters were significantly depleted in ¹⁴ C.

Cellulose of tree rings is often assumed to be predominantly formed by direct assimilation of CO 2 by photosynthesis and consequently can be used to reconstruct past atmospheric ¹⁴ C concentrations at annual resolution. Yet little is known about the extent and the age of stored carbon from previous years used in addition to the direct assimilation in tree rings. Here, we studied ¹⁴ C in earlywood and latewood cellulose of four different species (oak, pine, larch and spruce), which are commonly used for radiocarbon calibration and dating. These trees were still growing during the radiocarbon bomb peak period (1958–1972). We compared cellulose ¹⁴ C measured in tree-ring subdivisions with the atmospheric ¹⁴ C corresponding to the time of ring formation. We observed that cellulose ¹⁴ C carried up to about 50% of the atmospheric ¹⁴ C signal from the previous 1–2 years only in the earlywood of oak, whereas in conifers it was up to 20% in the earlywood and in the case of spruce also in the latewood. The bias in using the full ring of trees growing in a temperate oceanic climate to estimate atmospheric ¹⁴ C concentration might be minimal considering that earlywood has a low mass contribution and that the variability in atmospheric ¹⁴ C over a few years is usually less than 3‰.

The Altai mountains contain a number of cave and rockshelter sites that have given crucial information about human evolution in Asia. Most of these caves are located in the Gornyi Altai of Siberia, while the southern flank of the range remains much less known. Bukhtarma Cave was a karstic cave located near the former village of Peshchera, on the banks of the Bukhtarma River running through the foothills of the southern (Kazakh) Altai mountains. The Soviet East Kazakhstan Archaeological Expedition carried several excavation campaigns in the cave in the early to mid 1950s, discovering Paleolithic stone tools as well as animal bones. The collections were split between the East Kazakhstan Regional Museum of Local History in Öskemen (the lithic and part of the faunal collection) and the Zoological Institute in Leningrad (now St. Petersburg) (most of the fauna). Subsequently, the site was flooded by the construction of the Bukhtarma Reservoir in 1958, such that further fieldwork is impossible. However, in 2020, we reanalyzed the zooarchaeological collections and obtained several ¹⁴C dates. Based on the excavation documentation and the newly obtained dates exclusively taken from cut marked and carnivore-modified bone, we reconstruct at least three Paleolithic archaeological horizons, spanning the time between ca. 47–30 ka cal BP and exhibiting Middle and Upper Paleolithic characteristics, as well as the remains of several Holocene occupations, the latest of which dates to the Bronze Age. We present here a summary of the lithic and faunal assemblage and draw general conclusions about the site’s placement within the regional Paleolithic.

The early Iron Age (800 to 450 BCE) in France, Germany and Switzerland, known as the ‘West-Hallstattkreis’, stands out as featuring the earliest evidence for supra-regional organization north of the Alps. Often referred to as ‘early Celtic’, suggesting tentative connections to later cultural phenomena, its societal and population structure remain enigmatic. Here we present genomic and isotope data from 31 individuals from this context in southern Germany, dating between 616 and 200 BCE. We identify multiple biologically related groups spanning three elite burials as far as 100 km apart, supported by trans-regional individual mobility inferred from isotope data. These include a close biological relationship between two of the richest burial mounds of the Hallstatt culture. Bayesian modelling points to an avuncular relationship between the two individuals, which may suggest a practice of matrilineal dynastic succession in early Celtic elites. We show that their ancestry is shared on a broad geographic scale from Iberia throughout Central-Eastern Europe, undergoing a decline after the late Iron Age (450 BCE to ~50 CE).

From ad 567–568, at the onset of the Avar period, populations from the Eurasian Steppe settled in the Carpathian Basin for approximately 250 years¹. Extensive sampling for archaeogenomics (424 individuals) and isotopes, combined with archaeological, anthropological and historical contextualization of four Avar-period cemeteries, allowed for a detailed description of the genomic structure of these communities and their kinship and social practices. We present a set of large pedigrees, reconstructed using ancient DNA, spanning nine generations and comprising around 300 individuals. We uncover a strict patrilineal kinship system, in which patrilocality and female exogamy were the norm and multiple reproductive partnering and levirate unions were common. The absence of consanguinity indicates that this society maintained a detailed memory of ancestry over generations. These kinship practices correspond with previous evidence from historical sources and anthropological research on Eurasian Steppe societies². Network analyses of identity-by-descent DNA connections suggest that social cohesion between communities was maintained via female exogamy. Finally, despite the absence of major ancestry shifts, the level of resolution of our analyses allowed us to detect genetic discontinuity caused by the replacement of a community at one of the sites. This was paralleled with changes in the archaeological record and was probably a result of local political realignment.

The article focuses on the stratigraphy of the late Byzantine pavement of the Southwest Church, Umm el-Jimal, Jordan and the production technology of their mortars by applying thin section petrography, x-ray diffractometry (XRD) and scanning electron microscopy with energy dispersive x-ray spectrometry (SEM-EDS). Investigations revealed the similarity between the studied pavement and standard Roman mosaic pavements. The pavement consists of four layers (statumen, rudus, nucleus and bedding), but lacks the tessellatum layer. The statumen was constructed using large stones and then leveled by soil and pebbles, while the other three layers are composed of lime-based mortars formed by two different recipes. The white-beige non-hydraulic mortar of the bedding layer consists of a lime binder and aggregates of scoria and organic fibers, and a Binder:Aggregate (B:A) ratio of 1:2. The grey hydraulic mortars of the rudus and nucleus are mixtures of lime and silica-rich silt/clay, fine sand, volcanic rocks, ceramics, and charcoal; and B:A ratios of 1:4. The rudus and nucleus mortars have high values of hydraulic and cementation indices, reflecting their hydraulic properties, which most probably originated from the reaction between lime, ceramic and volcanic inclusions. In contrast, lack of ceramic and absence of the reactions between lime and scoria of the bedding layer probably produced a mortar with low values of hydraulic and cementation indices, but durable and resistant to weight load.

This project investigates the prehistoric coastal site of Kalba on the Gulf of Oman in the context of exchange networks between maritime waterways and land-based caravan routes on the south-eastern Arabian Peninsula. In addition to favourable environmental conditions, raw-material procurement strategies were important for the economy of this multi-crafting community.

Compound-specific radiocarbon analysis (CSRA) provides the possibility to date sample material at a molecular level. N -alkanes are considered as specific compounds with high potential to CSRA. As these compounds originate from plant waxes, their radiocarbon ( ¹⁴ C) analysis can provide valuable information about the age and origin of organic materials. This helps to reconstruct and understand environmental conditions and changes in vegetation in the past. However, CSRA has two main challenges: The small sample size of CSRA samples, making them extremely sensitive to blank effects, and the input of unknown amounts of extraneous carbon during the analytical procedure. According to the previous study from Sun and co-workers, we used different-sized aliquots of leaves Fagus sylvatica ( n C27, n C29) and Festuca rubra agg ( n C31, n C33) as modern standards and two commercial standards ( n C26, n C28) as fossil standards for blank determination. A third commercial standard ( n C27) with predetermined radiocarbon content of F ¹⁴ C = 0.71 ( ¹⁴ C age of 2700 BP) serves to evaluate the blank correction. We found that the blank assessment of Sun and co-workers is also applicable to n -alkanes, with a minimum sample size of 15 µg C for dependable CSRA dates. We determined that the blank introduced during the analytical procedure has a mass of (4.1 ± 0.7) µg carrying a radiocarbon content of F ¹⁴ C = 0.25 ± 0.05. Applying the blank correction to a sediment sample from Lake Holzmaar (Germany) shows that all four isolated n -alkanes have similar ¹⁴ C ages. However, the bulk material of the sediment and branches found in the sediment core are younger than the CSRA dates. We conclude that the disparity between the actual age of analysed organic material and the age inferred from radiocarbon results, which can occur in sediment traps due to delayed deposition, is the reason for the CSRA age.

To reconstruct the history of organic carbon (OC) aerosol over south‐eastern Europe, dissolved organic carbon (DOC) and its ¹⁴C signature (DO¹⁴C) were investigated along an ice core drilled at the Mount Elbrus (ELB) in Caucasus. In summer, compared to pre‐1945 levels, the DOC concentrations increased by 45% after 1960, the mean DO¹⁴C depletion in recent ELB ice relative to atmospheric ¹⁴CO2 of 32% being attributed to fossil‐fuel sources. DO¹⁴C content of ice deposited during the bomb‐peak era (1955–1980) closely followed atmospheric ¹⁴CO2 changes caused by atmospheric nuclear tests, suggesting the living biosphere as the main biogenic source of DOC in summer in this region. ELB data contrast with those previously obtained in summer Alpine (western Europe) ice in which a post‐1950 doubling of DOC was observed and attributed to enhanced emissions of organic compounds from vegetation in France. This regional difference is discussed with respect to changes of biogenic organic compound emissions in response to past change of use‐land and global warming. ELB data document, for the first time, changes of DOC and DO¹⁴C in winter mountain ice showing an increase by 44% of DOC levels associated with a ¹⁴C signature being 47% lower than that of atmospheric ¹⁴CO2 in ELB ice deposited after 1960. The ¹⁴C winter ELB ice record followed atmospheric ¹⁴CO2 changes with a delay of ∼3 years, suggesting that remaining emissions from the living biosphere, together with a small contribution from wood burning, are the main biogenic sources of DOC in winter in this region.

With the beginning of the Early Bronze Age in Central Europe ~ 2200 BC, a regional and supra-regional hierarchical social organization emerged with few individuals in positions of power (chiefs), set apart by rich graves with extensive burial constructions. However, the social organization and stratification within the majority of people, who represent the non-elite, remain unclear. Here, we present genome-wide data of 46 individuals from the Early Bronze Age burial ground of Leubingen in today’s Germany, integrating archaeological, genetic and strontium isotope data to gain new insights into Early Bronze Age societies. We were able to reconstruct five pedigrees which constitute the members of close biological kinship groups (parents and their offspring), and also identify individuals who are not related to individuals buried at the site. Based on combined lines of evidence, we observe that the kinship structure of the burial community was predominantly patrilineal/virilocal involving female exogamy. Further, we detect a difference in the amount of grave goods among the individuals buried at Leubingen based on genetic sex, age at death and locality but see no difference in the types of grave goods.

The West Church is one of the largest churches of Umm el-Jimal archaeological site which comprises 16 churches. The date of the construction of the church is debated and the dates of its latest stages of renovation and use are obscure. This research aims to investigate the chronology of the church and clarify the dates of the latest renovation of its mosaic and plaster floors. The radiocarbon dates are carried out on organic inclusions of mortars and plasters from the floors of the church collected from three trenches opened in different locations of the church. The radiocarbon dates showed that the mosaic floors of the nave and the raised chancel, built with the same technology, were paved contemporaneously between 433 and 565 cal AD, while the plaster floor of the courtyard at the east entrance of the north room of the church was paved before the 551 cal AD (433 and 539 cal AD). The results include an old date (16–203 cal AD), which might represent an older phase of the church’s history or more probably an earlier structure. The date of the mosaic, which more probably indicates its construction rather than a renovation phase, agrees with the dates of the pottery sherds (although few and small) uncovered from the excavated trenches. The date of the mosaic floor that lies before 565 cal AD contradicts the general trend of the dates for the renovation of other churches, after 551 AD, the date of the disastrous earthquake that affected the Umm el-Jimal site.

This paper discusses the use of “legacy data” in research on Roman Period iron smelting in the territory of the Przeworsk Culture in Magna Germania. The dataset includes results of 240 analyses of smelting slag and iron ores chemistry. A majority of these analyses were conducted in the 1950s-1980s. The quality of these data is far below present-day standards. Only major elements were reported, analytical methods were often not specified (although optical emission spectroscopy and wet chemical analyses can be assumed in such cases) and information on detection limits, precision and accuracy of the results is missing. In spite of this, a Principal Component Analysis-Agglomerative Hierarchical Clustering treatment successfully isolated observations from the three main iron smelting regions of the Przeworsk Culture (the Holy Cross Mountains, Masovia and Silesia). These results to a degree confirm a theory proposed in the 1960s by J. Piaskowski, according to whom it was possible to distinguish iron produced in the Holy Cross Mountains from the iron produced elsewhere in the territory of what is now Poland on the basis of metal characteristics. These findings will pave the way to the ongoing research project on the Przeworsk Culture metallurgy. It is also argued that, apart from a search for new methods in iron provenance studies, more attention should be paid to results of earlier analyses and to a compilation of legacy databases. The other result is an open and flexible Agglomerative Hierarchical Clustering R code to examine discrimination between production areas and to propose artefact provenance patterns in a convenient interactive way using the R development environment.

During the Upper Paleolithic, lions become an important theme in Paleolithic art and are more frequent in anthropogenic faunal assemblages. However, the relationship between hominins and lions in earlier periods is poorly known and primarily interpreted as interspecies competition. Here we present new evidence for Neanderthal-cave lion interactions during the Middle Paleolithic. We report new evidence of hunting lesions on the 48,000 old cave lion skeleton found at Siegsdorf (Germany) that attest to the earliest direct instance of a large predator kill in human history. A comparative analysis of a partial puncture to a rib suggests that the fatal stab was delivered with a wooden thrusting spear. We also present the discovery of distal lion phalanges at least 190,000 old from Einhornhöhle (Germany), representing the earliest example of the use of cave lion skin by Neanderthals in Central Europe. Our study provides novel evidence on a new dimension of Neanderthal behavioral complexity.

An ongoing long debate on the chronology of Julianos Church, Umm el‐Jimal, northeast Jordan, started in the early 20th century. It was claimed to be the earliest dated church (ad 344) by an inscription not found in situ. After five decades, it was proven that the inscription was mistakenly associated to the church, and ‘after the start of the fifth century ad’ was suggested as a new date. It is still argued that this new date is an early one, and the church might have been built in the late fifth to early sixth century ad when compared to the dated churches of sites surrounding Umm el‐Jimal. This research aims to reconstruct the chronology of Julianos Church by AMS radiocarbon dating organic inclusions collected from mortar samples from the pavement, the coats of the tiers of the bench and the steps of the throne of the synthronon. The AMS radiocarbon dates agree with the archaeological data in that Julianos Church was renovated after its good‐quality initial construction. Hence, the last decades of the sixth century ad (565–607) are interpreted to be the most probable date for the renovation of the synthronon, while the fifth century ad, probably the second half (465–507 ad), might be the construction date of the old mosaic floor (i.e., the church).

Almost every physical or chemical process in nature favors certain light stable isotopes over others, and thereby leaves an isotopic “fingerprint” on the substances involved. Prominent examples are the evaporation and condensation of water, which act together to produce a global “map” of hydrogen and oxygen isotopes in rainwater. Environmental parameters including humidity and soil fertility influence the stable isotope compositions of carbon and nitrogen in plant tissues. Therefore, every agricultural product carries isotopic information regarding its geographical origin, growing conditions, treatment and others. This makes stable isotope analysis a powerful tool for disclosing food authenticity and to applying quality checks to a number of products (e.g., wine, honey, and vanilla). Here we recapitulate the principles of stable isotope analysis in general as well as some applications to coffee from the literature and present our recent measurements of carbon, nitrogen, hydrogen and oxygen isotopes on a well defined set of coffee samples.

The Subalyuk hominin remains were uncovered in 1932 in a cave of the same name in the Bükk Mountains, near the village of Cserépfalu in Borsod-Abaúj-Zemplén County, Northern Hungary. The remains represent two individuals, an adult and a young child who have been described in a few publications since their discovery, providing substantial anthropological data and general assessments of their Neanderthal affiliation. They were associated with Late Mousterian industry. Thus, the Bükk Mountains gain importance in the discussion concerning the contribution of East Central European sites to the debate on the peopling history of Europe during the Late Middle to Early Upper Palaeolithic transition. In this paper, we summarize the archaeological and chronological context of the two individuals, and publish the first direct dating results that place them among the Last Neanderthals of Central Europe.

The radiocarbon analysis of uranium‐thorium‐dated cold‐water corals (CWCs) provides an excellent opportunity for qualitative reconstruction of past ocean circulation and water mass aging. While mid‐depth water mass aging has been studied in the Atlantic Ocean, the evolution of the thermocline is still largely unknown. Here we present a combined ¹⁴C and ²³⁰Th/U age record obtained from thermocline dwelling CWCs at various sites in the eastern Atlantic Ocean, with intermittently centennial resolution over the last 32 ka. Shallow dwelling CWCs off Angola, located in the South Atlantic, infer a link between the mid‐depth equatorial Atlantic and Southern Ocean. They confirm a ¹⁴C drawdown during the Last Glacial Maximum (LGM) and advocate for a consistent Southern Hemisphere radiocarbon aging of upper thermocline waters, as well as strong depth gradients and high variability. Direct comparison with ¹⁴C simulations carried out with an Ocean General Circulation Model yield good agreement for Angola. In contrast, the North Atlantic thermocline shows well‐ventilated water with strong variations near the position of today's Azores Front (AF), neither of which are captured by the model. During the Bølling‐Allerød, we confirm the important role of the AF in separating North and South Atlantic thermocline waters and provide further evidence of a 500 year long deep convection interruption within the Younger Dryas (YD). We conclude that the North and South Atlantic thermocline waters were separately acting carbon reservoirs during the LGM and subsequent deglaciation until the modern circulation was established during the YD.